doc: add rvagg to the TC

PR-URL: #1613
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>

Author: rvagg

README.md

@@ -276,7 +276,7 @@ information about the governance of the io.js project, see
   - Release GPG key: 9554F04D7259F04124DE6B476D5A82AC7E37093B
 * **Colin Ihrig** ([@cjihrig](https://github.com/cjihrig)) <cjihrig@gmail.com>
 * **Mikeal Rogers** ([@mikeal](https://github.com/mikeal)) <mikeal.rogers@gmail.com>
-* **Rod Vagg** ([@rvagg](https://github.com/rvagg)) <rod@vagg.org>
+* **Rod Vagg** ([@rvagg](https://github.com/rvagg)) <rod@vagg.org> (Technical Committee)
   - Release GPG key: DD8F2338BAE7501E3DD5AC78C273792F7D83545D
 * **Thorsten Lorenz** ([@thlorenz](https://github.com/thlorenz)) <thlorenz@gmx.de>
 * **Stephen Belanger** ([@qard](https://github.com/qard)) <admin@stephenbelanger.com>